The LM628/LM629 are dedicated motion-control processors designed for use with a variety
of DC and brushless DC servo motors, and other servomechanisms which provide a quadrature
incremental position feedback signal. The parts perform the intensive, real-time computational
tasks required for high performance digital motion control. The host control software interface is
facilitated by a high-level command set. The LM628 has an 8-bit output which can drive either an
8-bit or a 12-bit DAC. The components required to build a servo system are reduced to the DC
motor/actuator, an incremental encoder, a DAC, a power amplifier, and the LM628. An LM629-based
system is similar, except that it provides an 8-bit PWM output for directly driving H-switches. The
parts are fabricated in NMOS and packaged in a 28-pin dual in-line package or a SOIC-24 package
(LM629 only). Both 6 MHz and 8 MHz maximum frequency versions are available with the suffixes -6
and -8, respectively, used to designate the versions. They incorporate an SDA core processor and
cells designed by SDA.
The LM628/LM629 are dedicated motion-control processors designed for use with a variety
of DC and brushless DC servo motors, and other servomechanisms which provide a quadrature
incremental position feedback signal. The parts perform the intensive, real-time computational
tasks required for high performance digital motion control. The host control software interface is
facilitated by a high-level command set. The LM628 has an 8-bit output which can drive either an
8-bit or a 12-bit DAC. The components required to build a servo system are reduced to the DC
motor/actuator, an incremental encoder, a DAC, a power amplifier, and the LM628. An LM629-based
system is similar, except that it provides an 8-bit PWM output for directly driving H-switches. The
parts are fabricated in NMOS and packaged in a 28-pin dual in-line package or a SOIC-24 package
(LM629 only). Both 6 MHz and 8 MHz maximum frequency versions are available with the suffixes -6
and -8, respectively, used to designate the versions. They incorporate an SDA core processor and
cells designed by SDA.